Does it eat a lot and is it in the adult stage Pelo?It seems to me like a moult incoming because the tergites, EVERYWHERE are very far apart.A gravid one only has like the back end being swollen up, and below.

But I don't want to ruin your plans or ideas so you should really check if it is an adult or not. If it is, then yes probably a gravid fatty.If it is not, I would vote a moult incoming..

She's adult, doesn't eat a massive amount but I was thinking the pair hadnt been together long enough for her to get that size if she was gravid. I'm thinking moult as well so not getting excited about her.